JPS5949654B2 - Stranded wire manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing stranded wire conductors, particularly SB conductors.

Currently, there is a trend of stranded wire conductors of electric wires being converted into SB (Smoo wire body) for the purpose of improving electrical characteristics and saving materials.

When manufacturing this SB conductor, 1) the strands of the stranded conductor are formed one by one and twisted together, 2) after the round strands are twisted together, the twisted wires are passed through a die to form the SB conductor. to become
Methods such as these are being implemented. However, the use of conventional wire twisting machines has the following limitations.

In other words, when performing multi-layer twisting or concentric twisting, which is the most frequently used method for electric wire, 1. Conventional wire twisting machines rotate with either the material supply drum or the twisted wire winding drum held inside the machine. For these reasons, continuous production in which the material is supplied from outside the machine and the twisted wire is wound outside the machine is not possible, and the strands supplied to the two-strand wire machine are drawn from rough wire. A pre-process is required.

In addition, apart from the above-mentioned limitations, the cross-sectional area of the stranded wire of an SB conductor as a whole maintains a nearly dense circular shape, but the individual wires that make up this conductor have a nearly rectangular cross-section. ing.

The present invention has been made by focusing on the drawbacks of the prior art described above and the characteristics of SB conductors. To provide a method and device for producing conductors with a substantially rectangular cross section, twisting them and continuously winding them, or simultaneously obtaining multiple single wires without twisting. The purpose is to

Various methods have been proposed for simply making circular pipes, including (1) extrusion or drawing, (3) seaming, (3) continuous casting, and (4) comb-ohm (patent application filed in 1983). 193902).

However, with these methods, (a) is discontinuous and requires a core or special die, and those using a mandrel require preforming, and (b) is applicable only to thin inner thickness. c) requires large-scale equipment, and c) requires continuous production, but since the product is made while rotating, it requires a winding device. It has disadvantages such as the need to rotate it. The present invention utilizes the fact that in the above-mentioned comb-ohm method, tubes are manufactured continuously and that the tubes rotate around an axis, so that a line having a rectangular or fan-shaped cross section is continuously machined. , which can be taken out simultaneously as a stranded wire or as a plurality of single wires. That is, the present invention includes first and second rotating bodies that are rotatable on the same axis and constitute a wire passageway and a tube forming passageway, and that engage with the wire passageway and apply compressive stress to the wire in the wire passageway. a fixed housing having a spiral inner hole whose radial wire rod passage cross-sectional area gradually decreases in the circumferential direction; It is composed of a cutting tool and a rotary head provided in the axial direction with a strand passage that communicates with the passage formed between adjacent cutting tools, and the wire rod fed through the fixed housing advances through the tube forming path. The cylindrical material that is formed as the process progresses is cut into a plurality of continuous strands using the cutting tool, and these strands are twisted together.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 1 is a partially cutaway sectional view of the main body of a stranded wire forming machine, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a sectional view taken along the line shown in FIG.

In the figure, 1 and 8 are the first and second units rotating on the same axis.
The rotating body 1 has a protrusion 2 on its front end surface.
A shaft 3 is provided protruding from the rear end surface, and an internal shaft hole 4 is provided.
An internal shaft 5 is fitted into the internal shaft 5 via a bearing 1 (not shown), and the internal shaft 5 is provided with a strand passage 6 along its axial center and a threaded portion 7 at its tip.

The second rotating body 8 is an annular body whose base end 9 is connected to the rotating body 1.
An annular wire passage 10 perpendicular to the axis and a tube forming passage 11 parallel to the axis are formed between the rotor 1 and the protrusion 2. ) A rotary head 13 is fitted into a receiving cylinder portion 12 protruding from the inner shaft 5, and is fixed to a threaded portion T of the internal shaft 5 with a nut 16. Tube forming path 1
The length (depth) in the axial direction and the vertical interval can be arbitrarily selected depending on the thickness of the cylindrical material and the thickness of the strand to be cut, which will be described later. A plurality of cutting tools 14 are provided on the end surface of the rotating head 13 in contact with the rotating body 1.
A strand passage 15 is provided in a circular shape so as to protrude inward, and a strand passage 15 is provided in the axial direction inside the rotary head 13 and communicates with an orifice (not shown) formed between adjacent bits 14, 14. ing. Reference numeral 17 denotes a flat plate-shaped fixing shoe that engages with the wire passageway 10, and has a spiral inner hole 18 in which the cross section of the wire passageway gradually decreases in the circumferential direction as shown in FIG. A wire rod inlet 19 communicating with the inner hole 18 is provided.

Next, the operation of the molding machine main body will be explained.

The wire inserted from the wire inlet 19 of the fixed housing 17 is transferred to the first and second rotating bodies 1 and 8 that constitute the wire passage 10.
As it rotates, it is drawn into the passage 10 by the frictional force between the two, and advances along the spiral inner hole 18 of the fixed housing 17. At this time, since the inner edge of the inner hole 18 is formed so that the cross-sectional area of the passage 10 gradually decreases, it is deformed by compressive stress in the circular direction, and is pushed into the tube-forming passage 11 and formed into a circular tube shape. Saretsu\Byte 14 Proceed in the direction.
In this case, the rotating head 13 rotates in the opposite direction to the rotating bodies 1 and 8, rotates in the same direction at a faster speed than the rotating bodies 1 and 8, or completely stops. As a result, a relative speed difference occurs between these rotating bodies 1 and 8 and the rotating head 13, and a speed difference occurs between the circular tube-shaped material formed in the tube forming path 11 and the cutting tool 14 of the rotating head 13. The difference is that the circular tube is continuously cut by the cutting tool 14 to form a plurality of strands. These strands are extruded out of the machine through the strand passage 15 of the rotating head 13, applied with forward tension, and shaped by a die (not shown) attached to the front of the rotating head 13. after that,
When the rotating head 13 is rotating, the other strands passed through the strand passage 6 of the internal shaft 5 are gathered at a twisting opening (not shown) and twisted by the rotation of the rotating head 13). They are combined and further passed through a forming die and wound up as an SB conductor. Further, when the rotary head 13 is stationary, the wire is wound up as a multi-thread single wire. In this case, the direction of rotation of the circular tube and the cutting tool 1 attached to the rotating head 13 are
Reverse the direction of the cutting edge in step 4. FIG. 4 shows an overall view of a stranded wire manufacturing apparatus incorporating the forming machine main body.

In the figure, a indicates a wire rod (rough wire), and b indicates a wire serving as the core wire of the stranded wire, both of which are wound on a drum (not shown). The wire a is drawn down to a predetermined diameter by a die 20, passes through a rear tension applying device 21 having a plurality of rolls 22 and a preheating heater 23, and is supplied to an extrusion molding device 24 whose exterior is sealed, where it is extruded. Therefore, it is sent out as a plurality of strands.

The extrusion molding device 24 is connected to a vacuum device and an atmosphere adjustment device (not shown) through a pipe 25, and is designed to prevent scale (metal oxide) from forming on the extruded wire.

The extrusion molding device 24 is equipped with the above-mentioned molding machine main body, and the shaft 3 provided in the main body is fitted with a slip ring 26, which extends through a speed reducer 27 driven by a motor 28. The tip end is connected to a rotary joint 29 containing a molding die (not shown) for forming the wire b. That is, the shaft 3 directly serves as the output shaft of the reducer 2T, the molding machine main body is preheated by the electric power supplied by the slip ring 26, and the rotary joint 29 is equipped with a pipe 30 for feeding coolant. The shaft 3 and the necessary parts inside the molding machine main body can be cooled. Thus, a plurality of nine strands (not shown) fed out by the extrusion molding device 24 are fed through the rotary joint 29 and the shaft hole of the shaft 3 via the accumulator 31 that adjusts the deviation of the feeding. The strands b are centered at the twisting opening 32 which also serves as a forming die.

The collected plurality of strands and the strands b serving as the core wire are twisted by the rotation of the molding machine main body to form a strand c.

The necessary tension at the twister 32 is provided by a take-off capstan 33 and is wound onto a winder (not shown). This take-up capstan 33 is housed in a stranded wire cooling device 34, and the device 34 is connected to another atmosphere adjusting device (not shown) via a pipe.
It is connected to the. As described above, the present invention compresses and deforms the wire rod into a circular tube shape by using the first and second rotating bodies that constitute the wire rod passage and the tube forming passage, and the fixed shoe that engages with the wire rod passage. The material is formed into continuous strands by cutting it with a plurality of bits installed on a rotating body, and these are twisted together by the rotation of the rotating body. It is possible to continuously produce stranded wire without rotating the material supply drum or the stranded wire winding drum outside the machine, as in the case of a stranding machine, and it is also possible to produce stranded wires by drawing from a rough wire. Twisted wires can be manufactured consistently using a single system of equipment without requiring pre-processes such as manufacturing strands.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway perspective view showing a molding machine main body according to the present invention, Fig. 2 is a longitudinal sectional view thereof, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a molding machine of the same type. FIG. 1 is an overall view of a stranded wire manufacturing apparatus incorporating a machine body. 1...First rotating body, 8...Second rotating body, 10...Wire passage, 11...One tube forming passage, 13... ...Rotating body, 14...
- Part-time job, 1T...Fixed shoe, 18...
...Inner hole.

Claims (1)

[Claims] 1. First and second rotary bodies that are rotatable on the same axis and constitute a wire passageway and a tube forming passageway; a fixed shoe having a spiral inner hole whose passage cross-sectional area gradually decreases in the circumferential direction; a plurality of bits that are fitted inside the second rotary body and whose end faces face the tube-forming passage; and adjacent bits; A circular tubular shape formed by a rotating head having a wire passage in the axial direction that communicates with a passage formed between the two, and formed as the wire inserted through the fixed tube advances through the tube forming path. A stranded wire manufacturing apparatus characterized in that the material is cut into a plurality of continuous strands using the cutting tool, and these strands are twisted together.